92339 leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 43% of adults in 92339 typically vote, below the U.S. average of about 62%. Among adults in 92339, ~17% vote Democratic, ~26% Republican, and ~57% don't vote. The map below shows estimated turnout by block group.
How 92339 compares
Among zip codes within 15 miles, 92339 leans more Republican than 9 of 14 neighbors.
92339 runs about 41 points more Republican than California as a whole. California leans Democratic overall, while 92339 is one of the few Republican-leaning pockets.
Why 92339 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 92339, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 1% of residents in 92339 live in densely developed areas, about 56 points below the California average of 58%. 92339 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 92339, CA sits in the bottom tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 92339 looks the way it does
Turnout in 92339 sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from California Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.